Java多线程之synchronized线程锁

 package org.study2.javabase.ThreadsDemo.sync;

 /**
  * @Auther:GongXingRui
  * @Date:2018/9/18
  * @Description:synchronized线程锁
  **/
 public class TicketApp {
     public static void main(String args[]) {
         Ticket ticket = new Ticket();
         Thread t1 = new Thread(ticket, "小红");
         Thread t2 = new Thread(ticket, "明明");
         t1.start();
         t2.start();
     }
 }

 class Ticket implements Runnable {
     int num = 20;
     private boolean flag = true;

     @Override
     public void run() {
         while (flag) {
             test();
         }
     }

     public synchronized void test() {
         if (num <= 0) {
             flag = false;
             return;
         }
         try {
             Thread.sleep(100);
         } catch (InterruptedException e) {
             e.printStackTrace();
         }
         System.out.println(Thread.currentThread().getName() + "抢到票：" + num--);
     }
 }